I have been succcessfully using BackUp Assist for over a year.
Lately I am getting the dreaded "Error Bad Data" message on a request to write data to media and during the Verify process during a request to read data from media.
see error log below for details.
does not happen every day, happens sometimes two days in a row. I use a different tape each day, m-f with 10 tape rotation.

seems to be on Drive E which is my second internal hard drive

I have cleaned the tape drive. I can create new media; and do so upon getting the error. I can do a test back up.

Backup started on 2/5/2007 at 10:19 AM.
Warning: The file \Accounting\MSSQL\Data\GPSDYNAMICSDat.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\GPSSNIDat.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\master.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\mastlog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\model.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\modellog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\msdbdata.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\msdblog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\northwnd.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\northwnd.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\pubs.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\pubs_log.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\tempdb.mdf in use - skipped.
Warning: The file \Accounting\MSSQL\Data\templog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\LOG\ERRORLOG in use - skipped.
Warning: The file \Accounting\MSSQL\LOG\GPSDYNAMICSLog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\LOG\GPSSNILog.ldf in use - skipped.
Warning: The file \Accounting\MSSQL\LOG\SQLAGENT.OUT in use - skipped.
Warning: The file \Inetpub\nntpfile\article.hsh in use - skipped.
Warning: The file \Inetpub\nntpfile\group.lst in use - skipped.
Warning: The file \Inetpub\nntpfile\groupvar.lst in use - skipped.
Warning: The file \Inetpub\nntpfile\history.hsh in use - skipped.
Warning: The file \Inetpub\nntpfile\xover.hsh in use - skipped.
Warning: The file \Inetpub\nntpfile\root\group.vpp in use - skipped.
Warning: The file \Inetpub\nntpfile\root\_slavegroup\group.vpp in use - skipped.
Warning: The file \Inetpub\nntpfile\root\control\group.vpp in use - skipped.
Backup completed on 2/5/2007 at 10:34 AM.
Directories: 280
Files: 3586
Skipped: 26
Bytes: 1,107,270,156
Time: 14 minutes and 38 seconds
Media name: "Monday (2/5/2007 10:16 Seq452)"

Backup started on 2/5/2007 at 10:34 AM.
Warning: The file \Database\Backend.ldb in use - skipped.
Warning: The file \Database\Backend.mdb in use - skipped.
Warning: The file \Database\MILLAGE\2006 lists and tally.xls in use - skipped.
Warning: The file \Database\MILLAGE\06 Millage Files\all clients service 2006.xls in use - skipped.
Warning: The file \Database\RefugeeToolkit\RefugeeBackend.ldb in use - skipped.
Warning: The file \Database\RefugeeToolkit\RefugeeBackend.mdb in use - skipped.
Warning: The file \Users\carolboerkoel\FAMILY REUNION.xls in use - skipped.
Warning: The file \Users\ctyler\My Documents\SNI Interpretation.doc in use - skipped.
Warning: The file \Users\ctyler\My Documents\~WRL0001.tmp in use - skipped.
Warning: The file \Users\ctyler\My Documents\~WRL0005.tmp in use - skipped.
Warning: The file \Users\ctyler\My Documents\~WRL1344.tmp in use - skipped.
Warning: The file \Users\ctyler\My Documents\~WRL3904.tmp in use - skipped.
Warning: The file \Users\toosterbaan\CM Procedures\Services and Programs\4.8 Fan Giveaway.doc in use - skipped.

Error: The device reported an error on a request to write data to media.
Error reported: Bad data.